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Test 70A - Oil Pressure Switch Sense Circuit Short To Ground

WARNING: This page is about a different car, the 1997 Eagle Vision, 1997 Dodge Intrepid, 1997 Chrysler LHS, and 1997 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform TEST 58A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  . For wiring schematics, see WIRING DIAGRAMS  in this article. Perform TEST VER-1 - VERIFICATION PROCEDURE  after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Turn ignition on. If oil warning lamp does not illuminate, go to TEST 70B  . If oil warning lamp illuminates, turn ignition off. Check engine oil level. Adjust oil level if necessary. If oil level is within specification, go to next step.
  2. Remove oil pressure switch. Switch is located on lower left side of engine. Connect hand-held oil pressure gauge in place of switch and start engine. If gauge reading is less than 4 psi (.28 kg/cm2 ) at idle, check mechanical condition of engine for low oil pressure. Repair as necessary. If gauge reading is 4 psi (.28 kg/cm2 ) or more at idle, go to next step.
  3. Allow engine to reach normal operating temperature. If gauge reading is less than 4 psi (.28 kg/cm2 ) with warm engine and at idle, check mechanical condition of engine for low oil pressure. Repair as necessary. If gauge reading is 4 psi (.28 kg/cm2 ) or more with warm engine and at idle, go to next step.
  4. Check if oil pressure warning lamp is off. If oil pressure warning lamp is off, replace oil pressure switch. If oil pressure warning lamp is on, go to next step.
  5. Turn ignition off. Disconnect instrument cluster Gray connector. Using scan tool in ohmmeter mode, measure resistance at terminal No. 5 (Gray wire) on instrument cluster Gray connector. If resistance is less than 5 ohms, repair short to ground in Gray wire. If resistance is 5 ohms or greater, repair or replace instrument cluster as necessary. See INSTRUMENT PANEL article in the ACCESSORIES & ELECTRICAL section.
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